\psset{unit=1,algebraic}
\begin{pspicture*}(-3.5,-2)(3.5,2)
\psplot[linecolor=blue]{-1}{1}{asin(x)}
\psaxes[labelFontSize=\scriptstyle,ticksize=-3pt 0,labelsep=2pt]{<->}(0,0)(-1.5,-2)(1.5,2)
\footnotesize
\rput[l](1,0.5){$f(x)=\arcsen x$}
\end{pspicture*}